arduino-控制自带的led灯实现LED呼吸灯的效果；

//led呼吸灯
void setup(){
    pinMode(2,OUTPUT);
    Serial.begin(9600);
    

}

void loop(){
    //渐亮
    for (int i = 0; i < 1023; i++)
    {
        analogWrite(2,i);
        delay(1);
    }
    //渐暗
    for (int i = 1023; i >0; i--)
    {
        analogWrite(2,i);
        delay(1);
    }
    
}